The Lenovo ThinkPad Pen Pro for X1 Yoga is an ideal input solution giving users 2048 levels of pressure for precise content creation. Users will also enjoy easy access to right and left click buttons built into the shaft of the pen that provide additional tools for data interaction. This pen is unique to the ThinkPad X1 Yoga in that it can be stored in the system pen slot made specifically for that pen. The pen will recharge while being stored and allows the user up to 130 minutes (active use) of battery life off a single charge. Diameter: 6.5 mmPressure sensitive: 2,048 levelsBattery: rechargeable battery in side for fast chargingCould be stored and charged in ThinkPad X1 Yoga pen slot